CN212646821U - Universal detection circuit for PNP and NPN signals - Google Patents
Universal detection circuit for PNP and NPN signals Download PDFInfo
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- CN212646821U CN212646821U CN201922228108.7U CN201922228108U CN212646821U CN 212646821 U CN212646821 U CN 212646821U CN 201922228108 U CN201922228108 U CN 201922228108U CN 212646821 U CN212646821 U CN 212646821U
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Abstract
The utility model provides a general detection circuitry of PNP & NPN signal, detection circuitry include first connector P1, second connector, resistance, opto-coupler, be equipped with first pin, second pin on the first connector, be equipped with first pin, second pin, third pin, fourth pin on the second connector, be equipped with first pin, second pin, third pin, fourth pin on the opto-coupler, the second pin of first connector passes through resistance and links to each other with the first pin of opto-coupler, the second pin of first connector passes through resistance and links to each other with the second pin of opto-coupler, the second pin of second connector passes through resistance and links to each other with the first pin of opto-coupler, the third pin of second connector passes through resistance and links to each other with the second pin of opto-coupler. The utility model discloses PNP & NPN signal solves safe grating output signal through detection circuitry and uses inconvenient problem on PNP or NPN.
Description
Technical Field
The utility model belongs to the technical field of the electron, a detection circuitry is related to, especially relate to a PNP & NPN general detection circuitry of signal.
Background
On daily equipment, the safety grating signal output has PNP and NPN output signals, the two output signals need to correspond to different input detection circuits, and when the safety grating output signal is detected, if a sensor for outputting the PNP signal is used, the sensor for outputting the NPN output signal cannot be used, so that the detection circuit cannot be used universally, needs to be replaced in time, and is inconvenient to select and use the safety grating.
SUMMERY OF THE UTILITY MODEL
The utility model provides a PNP & NPN general detection circuitry of signal to it is inconvenient to select the type at PNP or NPN to solve safe grating output signal, and uses inconvenient problem.
The utility model provides a PNP & NPN signal universal detection circuit, which comprises a first connector P1, a second connector P2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and an optical coupler U1, the first connector P1 is provided with a first pin and a second pin, the second connector P2 is provided with a first pin, a second pin, a third pin and a fourth pin, the optocoupler U1 is provided with a first pin, a second pin, a third pin and a fourth pin, the second pin of the first connector P1 is connected with the first pin of the optocoupler U1 through a resistor R2, the second pin of the first connector P1 is connected with the second pin of the optocoupler U1 through a resistor R3, the second pin of the second connector P2 is connected with the first pin of the optical coupler U1 through a resistor R1, the third pin of the second connector P2 is connected with the second pin of the optocoupler U1 through a resistor R4.
Furthermore, the first pin of the first connector P1, the first pin of the second connector P2, and the third pin of the optocoupler U1 are all grounded, and the fourth pins of the first connector P1 and the second connector P2 are all connected to a 24V power supply.
Furthermore, the resistor R1 and the resistor R4 are both 4.7K resistors.
Furthermore, the resistor R2 and the resistor R3 are both 1K resistors.
Further, the detection circuit further comprises an indicator light LED1, the indicator light LED1, the resistor R3 and the resistor R4 are connected with a second pin of the optocoupler U1 through the indicator light LED 1.
Further, the first connector P1 is provided with a fifth pin, and the fifth pin of the first connector P1 is connected to a 24V power supply.
The utility model discloses the circuit structure is through adopting opto-coupler and current-limiting resistor to form opto-coupler isolation input circuit to utilize first connector P1, second connector P2 to form PNP type and NPN type input selection circuit, realize the compatibility that detects PNP and NPN input signal, improve control circuit's availability factor.
Drawings
Fig. 1 is a schematic diagram of a circuit structure according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The embodiment of the utility model discloses a general detection circuitry of PNP & NPN signal, as shown in figure 1, the detection circuitry includes first connector P1, second connector P2, resistance R1, resistance R2, resistance R3, resistance R4, opto-coupler U1, the first connector P1 is provided with a first pin and a second pin, the second connector P2 is provided with a first pin, a second pin, a third pin and a fourth pin, the optocoupler U1 is provided with a first pin, a second pin, a third pin and a fourth pin, the second pin of the first connector P1 is connected with the first pin of the optocoupler U1 through a resistor R2, the second pin of the first connector P1 is connected with the second pin of the optocoupler U1 through a resistor R3, the second pin of the second connector P2 is connected with the first pin of the optical coupler U1 through a resistor R1, the third pin of the second connector P2 is connected with the second pin of the optocoupler U1 through a resistor R4.
Optionally, the first pin of the first connector P1, the first pin of the second connector P2, and the third pin of the optocoupler U1 are all grounded, and the fourth pins of the first connector P1 and the second connector P2 are all connected to a 24V power supply.
Optionally, the resistor R1 and the resistor R4 are both 4.7K resistors.
Optionally, the resistor R2 and the resistor R3 are both 1K resistors.
Optionally, the detection circuit further includes an indicator LED1, and the indicator LED1, the resistor R3, and the resistor R4 are both connected to the second pin of the optocoupler U1 through the indicator LED 1.
In particular, the first connector P1 is provided with a fifth pin, and the fifth pin of the first connector P1 is connected to a 24V power supply.
Wherein the second pin of the first connector P1 is connected to a raster signal, as shown in fig. 1. A first pin of the optocoupler U1 is an anode of the light emitting diode, a second pin is a cathode of the light emitting diode, a third pin is an emitter of the triode, and a fourth pin is a collector of the triode. The current transmission direction of the indicator light LED1 is guided to the resistor R3 and the resistor R4 by a second pin of the optocoupler U1.
When the raster signal is a PNP type safety raster signal, the first pin and the second pin of the second connector P2 are in short circuit, and the safety raster signal is connected to the second pin of the first connector P1. At this time, the working current direction of the safety grating signal flows from the second pin of the first connector P1 to the resistor R3 (resistor R2, optical coupler U1 and indicator light LED1), flows to the resistor R4 and flows to the second pin and the first pin of the second connector P2. Because the optocoupler U1 has current passing through, after the optocoupler U1 is conducted, a signal is output through a third pin and a fourth pin of the optocoupler U1.
When the raster signal is an NPN type safety raster signal, the third pin and the fourth pin of the second connector P2 are in short circuit, and the safety raster signal is connected to the second pin of the first connector P1. At this time, the working current direction of the safety grating signal flows from the fourth pin and the third pin of the second connector P2 to the resistor R1, flows to the resistor R2 (the optical coupler U1, the indicator light LED1 and the resistor R3) and flows to the second pin of the first connector P1. Because the optocoupler U1 has current passing through, after the optocoupler U1 is conducted, a signal is output through a third pin and a fourth pin of the optocoupler U1.
The utility model discloses circuit structure is through adopting opto-coupler and current-limiting resistor to form opto-coupler isolation input circuit, and utilize first connector P1, second connector P2 forms PNP type and NPN type input selection circuit, when the safety grating who connects PNP type or NPN type is input, select through the corresponding short circuit of row needle stitch, change the flow direction return circuit of electric current in the circuit, make the opto-coupler switch on, utilize the opto-coupler to keep apart output, realize the compatibility to PNP and NPN input signal detection, control circuit's availability factor is improved. And simultaneously, the embodiment of the utility model provides a through adopting pilot lamp LED1 and current-limiting resistor, form luminous LED indicating circuit
It should be finally noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, it should be understood by those skilled in the art that after reading the present specification, the technical personnel can still modify or equivalently replace the specific embodiments of the present invention, but these modifications or changes do not depart from the scope of the claims of the present application.
Claims (6)
1. The PNP & NPN signal general detection circuit is characterized by comprising a first connector P1, a second connector P2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and an optical coupler U1, the first connector P1 is provided with a first pin and a second pin, the second connector P2 is provided with a first pin, a second pin, a third pin and a fourth pin, the optocoupler U1 is provided with a first pin, a second pin, a third pin and a fourth pin, the second pin of the first connector P1 is connected with the first pin of the optocoupler U1 through a resistor R2, the second pin of the first connector P1 is connected with the second pin of the optocoupler U1 through a resistor R3, the second pin of the second connector P2 is connected with the first pin of the optical coupler U1 through a resistor R1, the third pin of the second connector P2 is connected with the second pin of the optocoupler U1 through a resistor R4.
2. The PNP & NPN signal general detection circuit according to claim 1, characterized in that the first pin of the first connector P1, the first pin of the second connector P2 and the third pin of the optocoupler U1 are all grounded, and the fourth pins of the first connector P1 and the second connector P2 are all connected with a 24V power supply.
3. The PNP & NPN signal universal detection circuit as claimed in claim 1, wherein the resistor R1 and the resistor R4 are both 4.7K resistors.
4. The PNP & NPN signal universal detection circuit as claimed in claim 1, wherein the resistor R2 and the resistor R3 are both 1K resistors.
5. The PNP & NPN signal general detection circuit according to claim 1, characterized in that the detection circuit further comprises an indicator LED1, the indicator LED1, the resistor R3 and the resistor R4 are both connected with the second pin of the optocoupler U1 through the indicator LED 1.
6. The PNP & NPN signal general detection circuit as claimed in claim 2, wherein the first connector P1 is provided with a fifth pin, and the fifth pin of the first connector P1 is connected with a 24V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922228108.7U CN212646821U (en) | 2019-12-12 | 2019-12-12 | Universal detection circuit for PNP and NPN signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922228108.7U CN212646821U (en) | 2019-12-12 | 2019-12-12 | Universal detection circuit for PNP and NPN signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212646821U true CN212646821U (en) | 2021-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922228108.7U Active CN212646821U (en) | 2019-12-12 | 2019-12-12 | Universal detection circuit for PNP and NPN signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212646821U (en) |
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2019
- 2019-12-12 CN CN201922228108.7U patent/CN212646821U/en active Active
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